I have a toshiba satellite e55-a5114 laptop that had win8 on it and after a failed install of ubuntu 14.04 desktop amd64 from usb the machine no longer will boot to win8 or allow install of 14.04 desktop amd64. I thought that maybe the ISO file was bad so I used MD5SUM to check it and the hash did not match. Every ISO file that I have downloaded has failed to match the hash. I downloaded from Ubuntu site as well as torrent sites, all ISO files failed to match. I even tried Zorin 9.1 amd64 desktop and it failed the hash check too.
HERE IS THE WEIRD PART----every one of those ISO files does allow me to create a working bootable USB when I use Unebootin, allowing me to run Ubuntu from the USB without installing it. From here I can go to the HDD and partition/format the primary hdd drive etc... So the HDD seems to be okay. However if I try the install option to "erase disk and install Ubuntu" or any option other than "try Ubuntu without installing" it fails every time at about the same place with an I/O errno5 error.
So I need to know if the hash mismatches are the issue or if the HDD needs to be partitioned and formatted in a very specific way or if some other issue needs to be resolved. HELP UBUNTU NEWBIE PLEASE!